/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package Controlers;

import Pojos.SanPham;
import Pojos.ThamSo;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

/**
 *
 * @author ToanNhan
 */
@WebServlet(name="IndexControler", urlPatterns={"/IndexControler"})
public class IndexControler extends HttpServlet {
   
    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
      
        try {
           String command = request.getParameter("command");
           if (command == null){
               response.sendRedirect("index.jsp");
           }else{
               command = command.toLowerCase();
               if (command.compareTo("laydanhsachsanphambanchay") == 0){
                   System.out.print("------------------------------ lay san pham ban chay------------------");
                   layDanhSachSanPhamBanChay(request, response);
               }
               if (command.compareTo("laydanhsachsanphamxemnhieu") == 0){
                   System.out.print("------------------------------ lay san pham xem nhieu------------------");
                   laySanPhamXemNhieu(request, response);
               }              
           }

        } finally { 
           
        }
    } 

 

    protected void layDanhSachSanPhamBanChay(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
        SessionFactory factory = new Configuration().configure("Pojos/hibernate.cfg.xml").buildSessionFactory();
        Session session = factory.openSession();
        Query query = session.createQuery("From SanPham as sp Order By sp.soLuotMua desc");
        List<SanPham> dsSanPham = query.list();
        query = session.createQuery("From ThamSo");
        ThamSo thamSo = (ThamSo)query.uniqueResult();
        int soLuongMax = thamSo.getSoLuongSanPhamBanChayMax();
        if (dsSanPham.size() > soLuongMax){
            dsSanPham = dsSanPham.subList(0, soLuongMax - 1);
        }
        request.setAttribute("dsSanPhamBanChay", dsSanPham);
        session.close();
        factory.close();
        request.getRequestDispatcher("index.jsp").forward(request, response);
    }

    protected void laySanPhamXemNhieu(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
        SessionFactory factory = new Configuration().configure("Pojos/hibernate.cfg.xml").buildSessionFactory();
        Session session = factory.openSession();
        Query query = session.createQuery("From SanPham as sp Order By sp.soLuotXem desc");
        List<SanPham> dsSanPham = query.list();
        query = session.createQuery("From ThamSo");
        ThamSo thamSo = (ThamSo)query.uniqueResult();
        int soLuongMax = thamSo.getSoLuongSanPhamXemNhieuMax();
        if (dsSanPham.size() > soLuongMax){
            dsSanPham = dsSanPham.subList(0, soLuongMax - 1);
        }
        request.setAttribute("dsSanPhamXemNhieu", dsSanPham);
        session.close();
        factory.close();
        request.getRequestDispatcher("index.jsp").forward(request, response);
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    } 

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
